Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...
Reexamination Certificate
2005-02-01
2005-02-01
Thomas, David B. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Having work engaging and force exerting portion inserted...
C081S436000
Reexamination Certificate
active
06848346
ABSTRACT:
A novel drive bit for mounting in a sleeve of a rotary driving tool for driving a slottedd screw having a hollow cap with a threaded interior cylindrical wall having an inner minor diameter comprises a driver portion at one end thereof and a sleeve engaging portion at the other end thereof, wherein the driver portion includes a generally cylindrical aligning portion with a predetermined diameter of between about 85% and about 99½% of the inner minor diameter and a pair of laterally opposed concave surfaces tapering at a predetermined radius of curvature of between about 50% and about 150% of the inner minor diameter to a generally rectangular flat headed tip for engaging the slot of the screw while the generally cylindrical aligning portion aligns the cap and the screw substantially coaxially with the bit.
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U.S. Appl. No. 10/213,795, Kolodziej, Norbert K., Bodin, Richard G. Mushrooming Expandable Anchor.
Breh Donald J.
Croll Mark W.
Illinois Tool Work Inc
Soltis Lisa M.
Thomas David B.
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